minion is an IRC robot (who prefers the term "electronically composed.") For online help, try

/msg minion help

Minion is hosted at common-lisp.net and is usually connected to the #lisp IRC channel. It has some personality to entertain IRC users, and also serves as a knowledgebase and a tool for looking up CLiki.

For minion sources, look at cliki-bot in the example directory of cl-irc (colorized sources at paste.lisp.org .) Cliki-bot was written by Brian Mastenbrook.

By the way, if you want to keep on terms with IRC users, do not play with minion in a channel. If you must, use private IRC messages.